Better _____ all the lights are turned off before you leave the classroom．

Every minute is made full use of __ at our lessons.

 If women are mercilessly exploited by fashion year after year, they have only themselves ______ .

  in the early 20th century, the school keeps on inspiring children’s love of art.

The convenient media give people the chance to have the information we look forward_____ to them quickly and cheaply.